package com.dragon.common.util;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static java.util.regex.Pattern.compile;

/**
 * 驼峰转换
 * @author zy
 */
public class StringUtils extends org.apache.commons.lang3.StringUtils {

    public static String generateString(String str,Object ... comms) {
        for(Object s : comms) {
            str = str.replaceFirst("\\{\\}",s.toString());
        }
        return str;
    }

    /**
     * 下划线转驼峰法(默认小驼峰)
     *
     * @param line 源字符串
     * @param smallCamel 大小驼峰,是否为小驼峰(驼峰，第一个字符是大写还是小写)
     * @return 转换后的字符串
     */
    public static String underline2Camel(String line, boolean... smallCamel) {
        if (StringUtils.isBlank(line)) {
            return "";
        }
        StringBuffer sb = new StringBuffer();
        Pattern pattern = compile("([A-Za-z\\d]+)(_)?");
        Matcher matcher = pattern.matcher(line);
        // 匹配正则表达式
        while (matcher.find()) {
            String word = matcher.group();
            // 当是true 或则是空的情况
            if ((smallCamel.length == 0 || smallCamel[0]) && matcher.start() == 0) {
                sb.append(Character.toLowerCase(word.charAt(0)));
            } else {
                sb.append(Character.toUpperCase(word.charAt(0)));
            }

            int index = word.lastIndexOf('_');
            if (index > 0) {
                sb.append(word.substring(1, index).toLowerCase());
            } else {
                sb.append(word.substring(1).toLowerCase());
            }
        }
        return sb.toString();
    }

    /**
     * 驼峰法转下划线大写
     *
     * @param line 源字符串
     * @return 转换后的字符串
     */
    public static String camel2UnderlineUpperCase(String line) {
        if (StringUtils.isBlank(line)) {
            return "";
        }
        line = String.valueOf(line.charAt(0)).toUpperCase().concat(line.substring(1));
        StringBuffer sb = new StringBuffer();
        Pattern pattern = compile("[A-Z]([a-z\\d]+)?");
        Matcher matcher = pattern.matcher(line);
        while (matcher.find()) {
            String word = matcher.group();
            sb.append(word.toUpperCase());
            sb.append(matcher.end() == line.length() ? "" : "_");
        }
        return sb.toString();
    }
    /**
     * 驼峰法转下划线小写
     *
     * @param line 源字符串
     * @return 转换后的字符串
     */
    public static String camel2UnderlineLowerCase(String line) {
        if (StringUtils.isBlank(line)) {
            return "";
        }
        line = String.valueOf(line.charAt(0)).toUpperCase().concat(line.substring(1));
        StringBuffer sb = new StringBuffer();
        Pattern pattern = compile("[A-Z]([a-z\\d]+)?");
        Matcher matcher = pattern.matcher(line);
        while (matcher.find()) {
            String word = matcher.group();
            sb.append(word.toUpperCase());
            sb.append(matcher.end() == line.length() ? "" : "_");
        }
        return sb.toString().toLowerCase();
    }
}
